Definition of Pharmacodynamics Pharmacodynamics is the study of the biochemical and physiological effects of drugs on the body or on

Definition of Drug A drug may be defined as any substance that brings about a change in biologic function through

Introduction to Antagonism in Pharmacology Antagonism could be defined as an interaction between two or more drugs that have opposite

Ligand-induced Receptor Desensitization Repeated or continuous administration of an agonist or an antagonist may lead to changes in the responsiveness

The therapeutic index (also known as therapeutic ratio), is a comparison of the amount of a therapeutic agent that causes

The magnitude of response produced by a drug is a function of the dose administered. There is a systemic relationship

Drug-receptor interaction is characterized by: binding of drug to receptor and generation of a response in a biological system. The

Drug synergism Drug synergism: This is an interaction between two or more drugs that causes the total effect of the

What is Pharmacology? Pharmacology is the science of drugs (Greek pharmakos, medicine or drug; and logos, study). In actual use,